Lid for a drinking container

ABSTRACT

A lid for a drinking container includes a circular upper portion having a groove portion extending on the circumference of the circular upper portion, and a circular lower portion having a counterpart groove portion extending on the circumference of the circular lower portion. The circular upper portion includes first and second openings and the circular lower portion includes corresponding first and second openings. The groove portion of the circular upper portion and the counterpart groove portion of the circular lower portion are configured to be coupled with each other to guide the circular upper portion and the circular lower portion to be turned in relation to each other around a common axis in a manner enabling the first openings being aligned and the second openings being aligned in an opening position, and enabling the first openings being un-aligned and the second openings being un-aligned in a closing position.

TECHNICAL FIELD OF THE INVENTION

The invention relates to a lid for a drinking container, such as especially a lid for a coffee or tea mug for preventing any leaking or spilling of liquid contained the mug in use. In addition the invention relates to a method for manufacturing the lid for the drinking container.

BACKGROUND OF THE INVENTION

Numbers of different lid for drinking containers are known, where one of the simplest one is a plastic flat lid having a small drinking hole on the top cover area and a bent rim portion, which is to be settled around the rim portion of a cardboard coffee mug. Also rubber lids are known, where the drinking hole is sealed with a sealing member. The sealing member has typically a small arm and is hinged so that it can be turned away from the drinking hole for drinking the liquid inside the mug, and again it can be turned over the drinking hole for a sealing purpose. The sealing member is pressed against the drinking hole in sealing position by spring force of the arm. Furthermore more complex structures are also known, such as lids with inner sealing members having e.g. springs and sealing balls, where the balls are pushed by the springs into and away from the drinking hole for example when the lid is turned around.

There are however some disadvantages relating to the known prior art, such as the plastic flat lid having a small drinking hole does not have any sealing function for the drinking hole. In addition the rubber lid with the sealing member is not tight enough because the spring force of the arm is often loosen and especially because the small arm is easily bent or even swing away from the hole area, for example when the mug is put into a bag. Furthermore lids with inner sealing members having e.g. springs and sealing balls are very complex to manufacture and additionally extremely difficult to keep clean, and often there is also no clear feedback or indication to the user when the lid is in an open or closed position.

SUMMARY OF THE INVENTION

An object of the invention is to alleviate and eliminate the problems relating to the known prior art. Especially the object of the invention is to provide a lid for a drinking container, which is easy to use and keep clear and additionally seals the drinking hole in liquid tightly and reliable way so that any unwanted opening of the drinking hole is prevented. In addition an object is to provide a lid, which provides a clear indication to the user whether the lid is in an open or closed position.

The object of the invention can be achieved by the features of independent claims.

The invention relates to a lid according to claim 1. In addition the invention relates to a manufacturing method of the lid according to claim 17.

According to an embodiment of the invention a lid for a drinking container comprises upper and lower portions. The upper portion is a circular upper portion, and it comprises a groove portion, such as e.g. a recess in an inner surface extending at least partially and advantageously essentially on the circumference of the circular upper portion. The lower portion is a circular lower portion and it comprises a counterpart groove portion for the groove portion of the upper portion, such as e.g. a projecting portion in an outer surface extending at least partially and advantageously essentially on the circumference of the circular lower portion. The circular upper portion comprises additionally first and second openings, namely one for drink outlet and one for compensation air inlet. In addition the circular lower portion comprises corresponding first and second openings, one for drink outlet and one for compensation air inlet.

The groove portion of the circular upper portion and the counterpart groove portion of the circular lower portion are advantageously configured so that they can be coupled with each other in use. The coupling is advantageously implemented so to guide the circular upper portion and the circular lower portion in the manner where they can be turned in relation to each other around a common axis. When turning the portions, they enable the first openings being aligned and the second openings being aligned in an opening position and thereby allowing liquid flow through via the first openings and compensation air inlet via the second openings. In addition the portions enable the first openings being un-aligned and said second openings being un-aligned in a sealing manner in a closing position, so when the portions are turned in the manner where the openings are not aligned. In the closing position the openings of the drinking container are sealed in a liquid tightly manner and thereby any leaking or spilling of liquid contained the mug can be prevented.

According to an embodiment the first and second openings of the circular lower portion are provided with sealing members, such as rubber or silicone members, which are arranged to be pressed against the circular upper portion in a non-opening position in a liquid-tightly sealing manner. The sealing members are advantageously arranged around the opening areas so to prevent any leakage into the space between circular upper and lower portions. In addition the circular lower portion comprises a sealing ring extending around the inner rim portion of the circular lower portion. The sealing ring is configured to be faced against an outer wall of the drinking container in a liquid-tightly sealing manner so to prevent any leakage of the liquid between the lid and the mug. The sealing ring is advantageously soft rubber or silicon, which easily take a shape of the outer wall rim of the mug and thereby provide effective sealing.

In addition, according to an embodiment the circular lower portion comprises at least one locking member and the circular upper portion comprises at least one counterpart locking member. The locking members are configured to lock a free circular movement at least in the opening and closing positions, when the circular upper portion and the circular lower portion are turned in relation to each other around said common axis. The locking member may be implemented e.g. by snap elements or a tongue element and the counterpart locking member by a cut (or vice versa). The cut is configured to be coupled with said tongue and thereby lock the circular upper and lower portions in relation to each other in the opening and closing positions. It is to be noted that the locking members can be positioned freely into the circular upper and lower portions thereby enabling number or different positions to be locked the circular upper and lower portions.

The locking members, such as the snap elements or tongue elements and the counterpart locking members, may be implemented so that they provide haptic and/or audible feedback for the user when closing or opening the lid, such as snap sound and resistance change felt before snapping into closed or opened position. Additionally or alternatively the lid may comprise also visual alignment or indication for the closed or opened positions.

According to an embodiment the circular upper portion comprises a protruding section in the outer rim area. In addition the circular lower portion comprises also a protruding section in the outer rim area. These protruding sections comprise essentially the same shape with each other, and according to an advantageous embodiment they are configured to be aligned in the closing position and thereby preventing to grip on the circular upper portion and to disconnect said circular upper and lower portions from each other. In the opening position they are configured to be un-aligned thereby easily allowing disconnecting said circular upper and lower portions from each other.

Furthermore, according to an advantageous embodiment the circular lower portion comprises two structural portions, one of which comprises hard material, like plastic, and one of which comprises said counterpart groove portion and reinforcement structure. Also the circular upper portion may comprise two structural portions, one of which comprises hard material, like plastic, and another, the outer portion a cover material, which is advantageously such that it is easy to hold, such as rubber, silicone or TPU (thermoplastic polyurethane) or other thermoplastic elastomers, like TPV which can be used also for the soft part of the inner lid. The cover material extends over the outer portion of the lid and comprises advantageously an opening in the connection with the drinking outlet (the first opening) so that the liquid can flow out from the mug via the drinking outlet. The opening is advantageously larger than any of said first and/or second openings of the circular upper portions. The cover material with the opening is arranged into the upper portion so to prevent or minimize finger touches to the drinking hole. The structural portion comprises additionally a reinforcement structure at the portion of the opening of the cover material thereby preventing any mechanical deformation and damage to the cover material.

The present invention offers advantages over the known prior art, such as an easy and liquid-tight manner to close the drinking hole of the lid and an easy and hygienic way to open it for drinking. The drinking hole can be closed in a reliable way so that any unwanted opening of the drinking hole is effectively prevented. In addition the invention provides the lid, which is easy to couple with the drinking container in a liquid-tight manner. The lid according to the invention can be implemented without any springs or sealing balls, which makes the structure and manufacturing process quite simple. In addition the lid of the invention is easy to use and keep clear. Moreover the lid provides a clear indication to the user whether the lid is in an open or closed position.

BRIEF DESCRIPTION OF THE DRAWINGS

Next the invention will be described in greater detail with reference to exemplary embodiments in accordance with the accompanying drawings, in which:

FIG. 1 illustrates a principle of an exemplary drinking container with a lid according to an advantageous embodiment of the invention,

FIG. 2 illustrates an exemplary lid according to an advantageous embodiment of the invention,

FIG. 3 illustrates exemplary circular upper and lower portions of the lid according to an advantageous embodiment of the invention,

FIG. 4 illustrates exemplary structural parts of the circular upper and lower portions of the lid according to an advantageous embodiment of the invention,

FIG. 5 illustrates an example of a cross section of the circular upper portion of an exemplary lid structure according to an advantageous embodiment of the invention,

FIG. 6 illustrates exemplary operation of the lid according to an advantageous embodiment of the invention,

FIG. 7 illustrates examples of locking members of the circular upper and 202 portions of the lid according to an advantageous embodiment of the invention,

FIGS. 8A-8B illustrate exemplary circular upper and lower portions with protruding section according to an advantageous embodiment of the invention,

FIG. 9 illustrates examples of sealing members around the first and second openings of the lid according to an advantageous embodiment of the invention,

FIG. 10 illustrates alignments of the circular upper and lower portions of the lid according to an advantageous embodiment of the invention,

FIG. 11 illustrates side view of the lid according to an advantageous embodiment of the invention,

FIG. 12 illustrates an example of the lid coupled with the drinking container according to an advantageous embodiment of the invention, and

FIG. 13 illustrates additional details of the circular upper portion according to an advantageous embodiment of the invention.

DETAILED DESCRIPTION

FIG. 1 illustrates a principle of an exemplary drinking container 100 with a lid 200 according to an advantageous embodiment of the invention. The typical drinking container 100 is e.g. a coffee or tea mug, but can of course be any drinking container capable of carrying liquid inside and with which the lid 200 can be used for preventing any leakage or spilling of the liquid.

FIGS. 2-6 illustrate different views of an exemplary lid 200 according to an advantageous embodiment of the invention, where in FIG. 2 the lid is assembled for use mode, and where in FIG. 3 the lid is divided into the circular upper portion 201 and circular lower portion 202 from which the lid is formed. In addition FIG. 4 illustrates an exemplary lid structure, where at least the circular lower portion 202 comprises two parts 202 a, 202 b, and additionally and optionally also the circular upper portion comprises two parts 201 a, 202 b. FIG. 5 illustrates a cross section figure of the circular upper portion 201 of an exemplary lid structure 200.

The upper portion 201 comprises a groove portion 203, such as e.g. a recess in an inner surface extending essentially on the circumference of the circular upper portion. The lower circular portion 202 comprises a counterpart groove portion 204 for the groove portion 203 of the upper portion 201, such as e.g. a projecting portion in an outer surface extending on the circumference of the circular lower portion 202. The circular upper portion 201 comprises additionally first opening 205 a and second opening 206 a, namely one for a drink outlet 205 a and one 206 a for a compensation air inlet. In addition the circular lower portion 202 comprises corresponding first opening 205 b and second opening 206 b, one 205 b for the drink outlet and one 206 b for the compensation air inlet. When the lid is assembled, as is the case in FIG. 2, the lid comprises in the drinking mode the first opening as said drink outlet 205 and the second opening 206 as for a compensation air inlet.

The groove portion 203 of the circular upper portion 201 and the counterpart groove portion 204 of the circular lower portion 202 are configured so that they can be coupled with each other in use, as can be seen in FIG. 5. The coupling guides the circular upper portion 201 and the circular lower portion 202 so that they can be turned in relation to each other around a common axis 207, as can be seen especially in FIG. 6. When turning the portions 201, 202, they enable the first openings 205 a, 205 b being aligned and the second openings 206 a, 206 b being aligned in an opening position (e.g. FIG. 2 and FIG. 6) and thereby allowing liquid flow through via the first openings 205 and compensation air inlet via the second openings 206.

In addition the portions 201, 202 enable the first openings 205 a, 206 b being un-aligned and said second openings 205 b, 206 b being un-aligned in a sealing manner in a closing position, so when the portions are turned in the manner where the openings are not aligned. In the closing position the openings of the drinking container are sealed in a liquid tightly manner and thereby any leaking or spilling of liquid contained the mug can be prevented.

As can be seen in FIG. 4 the circular lower portion 202 comprises two structural portions 202 a, 202 b, one 202 b of which comprises hard material, like plastic, and one 202 a of which comprises said counterpart groove portion 204 and reinforcement structure 208. The reinforcement structure 208 prevents the lid 200 to bend especially inwards when the circular upper and lower portions 201, 202 are disconnected. Also the circular upper portion may comprise two structural portions 201 a, 201 b, one 201 b of which comprises hard material, like plastic, and another, the outer portion 201 a a cover material, which is advantageously such that it is easy to hold, such as rubber, silicone or TPU (thermoplastic polyurethane). The cover material 201 a extends advantageously over the outer portion of the lid and comprises advantageously an opening 209 in the connection with the drinking outlet 205 (the first opening 205 a of the upper portion 201) so that the liquid can flow out from the mug via the drinking outlet. The opening 209 is advantageously much bigger than the drinking hole 205 and the soft cover portion 201 a has advantageously the form as depicted in Figures. This allows the user to get a good grip of the upper portion 201 and at the same time, however, preventing any finger touches in the drinking hole 205 area.

In addition, as can be seen especially in FIGS. 3, 4, 5, 7, 9, 11 and 13, the circular upper portion 201 comprises also a circular concave portion 216, which comprises said first opening 205 a for the drink outlet 205. In addition the circular lower portion 202 comprises a circular counterpart ridge (convex) portion 217, which comprises the corresponding first opening 205 b for the drink outlet 205. The concave portion 216 of the circular upper portion 201 and the counterpart ridge portion 217 of the circular lower portion 202 are configured to be coupled with each other (in use) so to additionally guide the circular upper portion 201 and the circular lower portion 202 to be turned in relation to each other around said common axis 207 in the manner enabling said first openings being aligned and said second openings being aligned in the opening position (and thereby allowing drink outlet via the first openings and compensation air inlet via the second openings) and enabling said first openings being un-aligned and said second openings being un-aligned in the closing position.

Furthermore, as can be seen especially in FIGS. 3, 4, 5, 7, 9, 11 and 13, the circular upper portion 201 comprises an inner rim circular portion 218 alongside the concave portion 216, which comprises the second opening 205 b for the compensation air inlet. In addition the circular lower portion 202 comprises correspondingly an inner rim circular portion 219 alongside the circular counterpart ridge portion 217, which comprises the corresponding second opening 206 b for the compensation air inlet. Advantageously said inner rim circular portions 218, 219 are arranged different levels than said concave portion 216 and ridge portion 217 so that the inner rim circular portions 218, 219 are located in a recessed area in comparison to said concave and ridge portions, the recession protruding towards the drinking container in use. According to an example the rim works also as a one of the tracks of these two parts, where the upper lid portion 201 and it's inner rim circular portion 218 rotates around inner lid portion 219 and will keep the parts aligned and rotating seamlessly.

According to an embodiment the circular upper portion 201 comprises also a central opening 220 at the centre portion of the circular upper portion, and the circular upper portion comprises an elevated portion 221 at the centre portion of the circular lower portion, as can be seen e.g. in FIGS. 2 and 4. The elevated portion 221 protrudes into the central opening 220 of the circular upper portion when the lid is assembled, as is the case e.g. in FIG. 5. The rim portion 222 of the elevated portion 221 is configured to provide a guiding trail 223 to the circular upper portion 201, around which 223 the circular upper portion 201 is configured to be turned.

FIG. 6 illustrates the operation of the lid 200 according to an advantageous embodiment of the invention, where the lid 200 has two different positions, open and closed positions. When the circular upper portion 201 is turned 231 around 180° either left or right in relation to the circular lower portion 202, the lid becomes into open or closed position depending on the initial situation, and vice versa.

FIG. 7 illustrates locking members 210, 211 of the circular upper 201 and lower 202 portions of the lid 200 according to an advantageous embodiment of the invention, where the circular lower portion 202 comprises at least one locking member 210 and the circular upper portion 201 comprises at least one counterpart 211 locking member. The locking members are configured to lock a free circular movement at least in the opening and closing positions. In the example of FIG. 7 the locking member 211 of the upper portion 201 comprises a tongue element and the lower portion 202 a counterpart locking member implemented by a cut 210. The cut is configured to be coupled with said tongue and thereby lock the circular upper and lower portions in relation to each other in the opening and closing positions. The locking is implemented in a releasable manner. In addition the locking members 210, 211 are configured to provide tactile feedback, as a snap, to a user so that the user knows when the circular upper and lower portions are locked.

FIGS. 8A-8B illustrate exemplary circular upper 201 and lower 202 portions with protruding section 212, 213 in the outer rim area according to an advantageous embodiment of the invention. The protruding sections 212, 213 comprise essentially the same shape with each other, whereupon they are configured to be aligned in the closing position (FIG. 8B). When the protruding sections 212, 213 both of the upper and lower portions are aligned in the same position, they effectively prevent any gripping of the circular upper portion. Thus the forming and alignment of the protruding sections 212, 213 ensures and enables the upper and lower portions 201, 202 remaining attached to each other in use and especially in the closing position. For the opening position the upper and lower portions are turned around, whereupon the protruding sections 212, 213 become un-aligned (FIG. 8A). In the un-aligned position the un-aligned protruding sections 212, 213 easily allow also disconnecting the circular upper 201 and lower portions 202 from each other, which is configured to be happened especially in the opening position.

It is to be noted that the locking members 210, 211 illustrated in FIG. 7 guide the turning of the circular upper 201 and lower 202 in relation to each other so that the first locking position is advantageously in the opening position, where the protruding sections 212, 213 are un-aligned, and the second locking position is advantageously in the closing position, where the protruding sections 212, 213 are aligned. In the opening position also the drinking holes 205 a, 206 a are aligned with each other as well also the compensation air inlets 205 b, 206 b, and vice versa in the closing position also the drinking holes 205 a, 206 a are un-aligned with each other as well also the compensation air inlets 205 b, 206 b.

FIG. 9 illustrates sealing members 214, 215 around the first and second openings 205, 206 of the lid according to an advantageous embodiment of the invention. In the example the first opening 205 b and the second opening 206 b of the circular lower portion 202 are provided with the sealing members 214 and 215, respectively. The sealing members are arranged to be pressed against the rim portion of the first opening 205 a and the second opening 206 a of the circular upper portion 201 in the opening (drinking) position in a liquid-tightly sealing manner so to prevent any leakage into the space between circular upper and lower portions. In addition the sealing members may be arranged to be pressed against the circular upper portion structure 201 in the closing position in a liquid-tightly sealing manner and also thereby prevent any leakage from the openings 205 b, 206 b of the lower portion 202 into the space between circular upper and lower portions.

FIG. 10 illustrates an example of alignment members 224 of the lid 200 and corresponding alignment members 225 of the container 100 according to an advantageous embodiment of the invention for alignment the lid and the container with each other. The alignment members 224, 225 ensure that the lid 200 is coupled with the container 100 in right way, for example so that the drinking hole 205 is faced at the same or opposite side as a certain figure or portion of the mug.

The circular lower portion comprises advantageously also a sealing ring 226 extending around the inner rim portion of the circular lower portion, which can be seen also in FIG. 11. The sealing ring 226 is configured to be faced against an outer wall of the drinking container 100 (FIG. 12) in a liquid-tightly sealing manner so to prevent any leakage of the liquid between the lid 200 and the mug 100. The connection point 228 between the lid 200 and the mug 100 can also be seen in FIG. 12 in more details.

FIG. 11 illustrates side view of the lid 200 according to an advantageous embodiment of the invention, where the circular lower portion 202 comprises snap members 226 in the circular inner rim portion to be faced against the wall of the drinking container 100. In addition the outer rim end area 227 of the circular lower portion 201 comprises optionally also an end wall having a (small) protruding circular portion 227 projecting inward thereby causing a pressure against the outer wall of the drinking container 100, when the lid is coupled to the drinking container. These are for locking the circular lower portion 202 or the whole lid 200 tightly against the drinking container 100 when the circular lower portion (lid) is coupled with said drinking container in use.

Additionally, as can be seen e.g. in FIG. 11 an outer portion 229 of the circular upper portion 201 comprises a wall declined or projected inward. This is for preventing any gripping of it and again preventing circular upper portion 201 to be dismantled from the circular lower portion 202, and additionally preventing the lid 200 to be dismantled from the mug 100 by accident.

FIG. 13 illustrates additional details of the circular upper portion 201 of the lid 200 according to an advantageous embodiment of the invention, where the circular upper portion 201 comprises a special structure 230 for reinforcing the circular upper portion 201. This structure prevents enormous bending of the circular upper portion 201 and thereby also prevents disconnecting of the circular upper portions 201 a, 201 b from each other when the circular upper portion 201 is disconnected from the circular lower portion 202. Thus the circular upper portion 201 is more resistant to a stress when the circular upper portion 201. In addition the structure of the circular outer portion 201 has advantage in a manufacturing process, namely when the hard inner portion 201 b is manufactured e.g. by an injection moulding process of a first material, and additionally the soft outer portion 201 a is injection moulded of a second material using the same mould, the outer soft portion 201 a will adhere very hard to the inner portion 201 b.

The invention has been explained above with reference to the aforementioned embodiments, and several advantages of the invention have been demonstrated. It is clear that the invention is not only restricted to these embodiments, but comprises all possible embodiments within the spirit and scope of the inventive thought and the following patent claims. In addition it is to be noted that the features recited in dependent claims are mutually freely combinable unless otherwise explicitly stated. 

1. A lid (200) for a drinking container (100), wherein the lid comprises: a circular upper portion (201) comprising a groove portion (203) extending on the circumference of the circular upper portion, and a circular lower portion (202) comprising a counterpart groove portion (204) extending on the circumference of the circular lower portion, wherein: said circular upper portion (201) comprises a first (205 a) and second (205 b) openings and said circular lower portion (202) comprises corresponding first (206 a) and second (206 b) openings, wherein: said groove portion (203) of the circular upper portion (201) and said counterpart groove portion (204) of the circular lower portion (202) are configured to be coupled with each other so to guide the circular upper portion (201) and the circular lower portion (202) to be turned (231) in relation to each other around a common axis (207) in a manner enabling said first openings (205 a, 205 b) being aligned and said second openings (206 a, 206 b) being aligned in an opening position, and enabling said first openings (205 a, 205 b) being un-aligned and said second openings (206 a, 206 b) being un-aligned in a closing position.
 2. The lid of claim 1, wherein the circular upper portion (201) comprises a circular concave portion (216) and the circular lower portion comprises a circular counterpart ridge (217) portion, wherein said concave portion (2016) of the circular upper portion (201) and said counterpart ridge portion (217) of the circular lower portion (202) are configured to be coupled with each other so to additionally guide (223) the circular upper portion (201) and the circular lower portion (202) to be turned (231) in relation to each other around said common axis (207) in the manner enabling said first openings (205 a, 205 b) being aligned and said second openings (206 a, 206 b) being aligned in the opening position, and enabling said first openings (205 a, 205 b) being un-aligned and said second openings (206 a, 206 b) being un-aligned in the closing position.
 3. The lid of claim 1, wherein the circular concave portion (216) of the circular upper portion (201) comprises said first opening (205 a) and the circular counterpart ridge portion (217) of the circular lower portion (202) comprises said corresponding first opening (205 b).
 4. The lid of claim 3, wherein an inner rim circular portion (218) alongside the concave portion (216) of the circular upper portion (201) comprises said second opening (206 a) and an inner rim circular portion (219) alongside the circular counterpart ridge portion (217) of the circular lower portion (202) comprises said corresponding second opening (206 b).
 5. The lid of claim 4, wherein said inner rim circular portions (218, 219) are arranged different levels than said concave portion (216) and ridge portion (217) correspondingly.
 6. The lid of claim 1, wherein said first and second openings (205 b, 206 b) of the circular lower portion (202) are provided with sealing members (214, 215), wherein said sealing members are arranged to be pressed against the circular upper portion (202) in a non-opening position in a liquid-tightly sealing manner.
 7. The lid of claim 1, wherein the circular lower portion (202) comprises snap members (226) in the circular inner rim portion to be faced against the wall of the drinking container (100) in order to locking the circular lower portion (202) tightly against the drinking container when the circular lower portion is coupled with said drinking container and in use.
 8. The lid of claim 1, wherein the circular lower portion (202) comprises at least one locking member (210) and the circular upper portion (201) comprises at least one counterpart locking member (211), whereupon said locking members (210, 211) are configured to lock a free circular movement of the circular upper and lower portions at least in said opening and closing positions, when the circular upper portion and the circular lower portion are turned in relation to each other around said common axis (207).
 9. The lid of claim 1, wherein the circular upper portion (201) comprises a protruding section (212) in the outer rim area and the circular lower portion (202) comprises a protruding section (213) in the outer rim area, where said protruding sections (212, 213) comprise essentially the same shape with each other, and where said protruding sections are configured to be aligned in the closing position thereby preventing to grip on the circular upper portion and to disconnect said circular upper and lower portions from each other, and where said protruding sections are configured to be un-aligned in the opening position thereby allowing disconnecting said circular upper and lower portions from each other.
 10. The lid of claim 1, wherein the circular lower portion comprises a sealing ring (226) extending around the inner rim portion of the circular lower portion (220), where said sealing ring is configured to be faced against the drinking container's (100) outer wall in a liquid-tightly sealing manner.
 11. The lid of claim 1, wherein the circular upper portion (201) comprises a central opening (220) at the centre portion of the circular upper portion, and the circular lower portion (202) comprises an elevated portion (221) at the centre portion of the circular lower portion, said elevated portion (221) protruding into the central opening (220) of the circular upper portion, the rim portion of the elevated portion providing a guiding trail (223) to the circular upper portion (201), around which said circular upper portion is configured to be turned (231).
 12. The lid of claim 1, wherein the circular lower portion (202) comprises two structural portions, one (202 b) of which comprises hard material, like plastic and one (202 a) of which comprises said counterpart groove portion and reinforcement structure.
 13. The lid of claim 1, wherein said circular upper portion (201) comprises two structural portions, one (201 b) of which comprises hard material, like plastic, and another, the outer portion (201 a) a cover material, such as rubber, silicone or TPU, and wherein said cover material comprises an opening (209) being larger than any of said first and/or second openings (205 a, 206 a) of said circular upper portion (201), and wherein the structural portion having said hard material additionally comprises reinforcement structure (230) at the portion of the opening of the cover material.
 14. The lid of claim 1, wherein the outer rim end area (227) of the circular lower portion (202) comprises an end wall having a protruding circular portion projecting inward and thereby configured to cause a pressure against the outer wall of the drinking container (100), when said lid is coupled to the drinking container.
 15. The lid of claim 1, wherein an outer portion (201 a) of the circular upper portion (201) comprises a wall declined or projected inward and thereby preventing any gripping of it.
 16. The lid of claim 1, wherein said circular upper portion (201) and said circular lower portion (202) are configured to be coupled with each other in a releasable manner.
 17. A manufacturing method of a lid (200) for a drinking container (100), wherein the lid comprises: a circular upper portion (201) comprising a groove portion (203) extending on the circumference of the circular upper portion, and a circular lower portion (202) comprising a counterpart groove portion (204) extending on the circumference of the circular upper portion, wherein: said circular upper portion (201) comprises a first (205 a) and second (206 a) openings and said circular lower portion (202) comprises corresponding first (205 b) and second (206 b) openings, wherein: said groove portion (203) of the circular upper portion (201) and said counterpart groove portion (204) of the circular lower portion (202) are configured to be coupled with each other so to guide the circular upper portion (201) and the circular lower portion (202) to be turned (231) in relation to each other around a common axis (207) in a manner enabling said first openings (205 a, 205 b) being aligned and said second openings (206 a, 206 b) being aligned in an opening position, and enabling said first openings (205 a, 205 b) being un-aligned and said second openings (206 a, 206 b) being un-aligned in a closing position. 